A dozen people suspected of selling drugs -- including cocaine, heroin, marijuana and prescription pills -- were arrested this week after an 18-month investigation into drug sales in Port Chester.

Detectives served warrants on the suspects on Wednesday, Thursday and Friday, starting at 5 a.m. each day to catch the suspects at their homes or jobs, Port Chester Lt. James Ladeairous said. Most of the suspects were street-level dealers, according to police.

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The investigation was a cooperative effort by detectives from Port Chester and the Westchester County police Narcotics Unit.

Police arrested Cory Peterson, 26; Enrique Goyburu, 25; Ronald Harris, 35; George Duche, 23; Vincent King, 46; Demetrius Williams, 52; Markel Calhoun, 20; and Jacobo Castaneda, 30, all of Port Chester. They also arrested Lester Jones, 50, of Yonkers; John Lujan, 42, of Greenwich, Conn.; Frank Peterson, 45, of Mount Vernon; and Phyllis Scruggs, 57, of Bridgeport, Conn.

They were each charged with third-degree criminal sale of a controlled substance and criminal possession with intent to sell, both felonies. Ladeairous said some of the suspects may face additional charges, and police anticipate more arrests as the investigation continues.

The 12 suspects were arraigned in Port Chester Village Court on Friday morning and sent to Westchester County Jail without the possibility of bail. Several have been represented by public defenders in the past, but their current attorney information was not available Friday afternoon.